For an embroidery business (which is what they are buying) this isn't quite the case. Being able to design is a huge plus, but knowing production is more important then design. There are people that make good money in this trade that all they do is replicate. That's the important thing, knowing production, what will or won't translate, why and what can they do to make it look like it translated, but it's more about stitch type "trickery".
With "auto conversion" being all the rage in software (some call it auto digitizing, but it's really not and no matter how expensive the software is, it's still implemented worse then powertrace/live trace), not knowing production is what really kills. Even if the design is good and the output is good visual quality, if it runs for 50 mins versus 25 or 30 minutes, doesn't matter if running a single head or multi-heads or combination thereof, it's killing your bottom line.
You can be a kickass designer, but what you design doesn't work, because the production value isn't worth anything. Not many can do both and that's why we see a lot of people ripping off already done design and digitizing those, because all they can do is replicate (nothing wrong with only being able to replicate, it's what you replicate that's the concern with me).
What ikarasu said, even though specifically mention sign shops versus embroidery shops (which is what is being bought), actually still applies. Competition is fierce and there is very little divergence of competition outside of price for the most part. Knowing how to design my own stuff and knowing production (shoot most of my business is doing the pattern work (either from concept to stitch file or just the stitch file) for other shops) is what sets me apart from other shops. With more and more people using/recommending auto conversion and the rise of even more people getting into this trade, it's getting harder and harder to see a difference. Embroidery is going in very much the same direction that signs is going.
Doesn't mean that one still can't do well and thrive, but have to be a little more honest with the hurdles that are out there. Although it doesn't hurt if you also check some political check boxes (is it in your name or shared with your hubby or what)? Might be able to get subsidies that way to help out.
I love what I do, I teach other people to do what I do, but make no mistake it has it's hurdles.